
Triangles
by David A. Adler
Edward Miller, Illustrator
Reinforced  32 pages  8 1/2 x 10  US$ 17.95
ISBN: 9780823423781 
01012014
Also available as an ebook. Grade: THIRD  Age: 6 to 10
Themes: Shapes, Geometry
Recommendations: A, K*, LMC, SLJ*
CCSS Codes:
RI.4.110
4.MD.C.5, C.6, C.7
L.4.3, 4, 6
SL.4.15
W.4.2, 79
4.G.A.1, A.2
5.G. 3, 4


About the Book
What is a triangle? How do we identify it? Where can we find triangles? How do we measure the angles in a triangle? In their sixth mathematical nonfiction collaboration, David A. Adler and Edward Miller tackle these questions and more with crystalclear text and cheerful illustrations starring two friendly kids and one savvy robot.
THE REVIEWS ARE IN
★ “Labels and diagrams make the learning easy. . . . With lots of layers of information, this is a book that can grow with kids.”"—Kirkus Reviews, Starred Review
★ "A straightforward and easy introduction to triangles and angles. . . . A recommended purchase for any math collection, this title serves as a great update on the subject."—School Library Journal, Starred Review
"A fine resource for kids learning about triangles and those reviewing what they've learned."—Booklist
TRIANGLES meets the Common Core Standards for Mathematics for fifth grade: 5.G.3 & 4: Classify twodimensional figures into categories based on their properties.
Classroom Discussion Questions with CCSS:
1. Determine the main idea of Triangles and explain how it is supported by key details; summarize the text. RL.34.2 2. Determine the meaning of points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Explain how you determined the meaning. Did you use context clues or a dictionary? RL.34.4 3. Create and label a twodimensional figure that includes all the following characteristics. Identify points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. RL.34.4 / Math.Content.4.G.A.1 4. Describe the overall structure of the text. Did the structure enhance meaning? Explain. RL.1, 5
